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checksums.py is now run after upload.py, as part of the "upload" make target. As part of the refactor, checksums.py now takes as arguments a list of directories containing files to checksum. It will recursively checksum all files in listed directories. This means we no longer have to pass an explicit list of files into checksums.py. Instead, we can pass the artifact directory and automatically checksum everything within. This will allow us to generate files directly into the artifact directory instead of having to run upload.py to copy files there. MozReview-Commit-ID: 6ntnXU2Pp0E --HG-- extra : rebase_source : 7e019b366f14b3692ec702ff331a1e0306dc3805
136 lines
4.8 KiB
Python
Executable File
136 lines
4.8 KiB
Python
Executable File
#!/usr/bin/python
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import with_statement
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from optparse import OptionParser
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import hashlib
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import logging
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import os
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logger = logging.getLogger('checksums.py')
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def digest_file(filename, digest, chunk_size=131072):
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'''Produce a checksum for the file specified by 'filename'. 'filename'
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is a string path to a file that is opened and read in this function. The
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checksum algorithm is specified by 'digest' and is a valid OpenSSL
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algorithm. If the digest used is not valid or Python's hashlib doesn't
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work, the None object will be returned instead. The size of blocks
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that this function will read from the file object it opens based on
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'filename' can be specified by 'chunk_size', which defaults to 1K'''
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assert not os.path.isdir(filename), 'this function only works with files'
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logger.debug('Creating new %s object' % digest)
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h = hashlib.new(digest)
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with open(filename, 'rb') as f:
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while True:
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data = f.read(chunk_size)
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if not data:
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logger.debug('Finished reading in file')
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break
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h.update(data)
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hash = h.hexdigest()
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logger.debug('Hash for %s is %s' % (filename, hash))
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return hash
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def process_files(dirs, output_filename, digests):
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'''This function takes a list of directory names, 'drs'. It will then
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compute the checksum for each of the files in these by by opening the files.
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Once each file is read and its checksum is computed, this function
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will write the information to the file specified by 'output_filename'.
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The path written in the output file will have anything specified by 'strip'
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removed from the path. The output file is closed before returning nothing
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The algorithm to compute checksums with can be specified by 'digests'
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and needs to be a list of valid OpenSSL algorithms.
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The output file is written in the format:
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<hash> <algorithm> <filesize> <filepath>
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Example:
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d1fa09a<snip>e4220 sha1 14250744 firefox-4.0b6pre.en-US.mac64.dmg
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'''
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if os.path.exists(output_filename):
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logger.debug('Overwriting existing checksums file "%s"' %
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output_filename)
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else:
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logger.debug('Creating a new checksums file "%s"' % output_filename)
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with open(output_filename, 'w+') as output:
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for d in dirs:
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for root, dirs, files in os.walk(d):
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for f in files:
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full = os.path.join(root, f)
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rel = os.path.relpath(full, d)
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for digest in digests:
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hash = digest_file(full, digest)
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output.write('%s %s %s %s\n' % (
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hash, digest, os.path.getsize(full), rel))
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def setup_logging(level=logging.DEBUG):
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'''This function sets up the logging module using a speficiable logging
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module logging level. The default log level is DEBUG.
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The output is in the format:
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<level> - <message>
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Example:
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DEBUG - Finished reading in file
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'''
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logger = logging.getLogger('checksums.py')
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logger.setLevel(logging.DEBUG)
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handler = logging.StreamHandler()
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handler.setLevel(level)
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formatter = logging.Formatter("%(levelname)s - %(message)s")
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handler.setFormatter(formatter)
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logger.addHandler(handler)
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def main():
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'''This is a main function that parses arguments, sets up logging
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and generates a checksum file'''
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# Parse command line arguments
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parser = OptionParser()
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parser.add_option('-d', '--digest', help='checksum algorithm to use',
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action='append', dest='digests')
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parser.add_option('-o', '--output', help='output file to use',
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action='store', dest='outfile', default='checksums')
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parser.add_option('-v', '--verbose',
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help='Be noisy (takes precedence over quiet)',
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action='store_true', dest='verbose', default=False)
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parser.add_option('-q', '--quiet', help='Be quiet', action='store_true',
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dest='quiet', default=False)
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options, args = parser.parse_args()
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# Figure out which logging level to use
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if options.verbose:
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loglevel = logging.DEBUG
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elif options.quiet:
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loglevel = logging.ERROR
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else:
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loglevel = logging.INFO
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# Set up logging
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setup_logging(loglevel)
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# Validate the digest type to use
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if not options.digests:
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options.digests = ['sha1']
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for i in args:
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if not os.path.isdir(i):
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logger.error('%s is not a directory' % i)
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exit(1)
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process_files(args, options.outfile, options.digests)
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if __name__ == '__main__':
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main()
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